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Indoor positioning method based on visible light label

An indoor positioning, visible light technology, applied in positioning, transmission system, free space transmission and other directions, can solve the problems of weak satellite signal, can not penetrate, can not achieve positioning, etc., to achieve the effect of high precision

Active Publication Date: 2014-05-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These systems can meet people's positioning needs well outdoors, but because satellite signals are generally very weak and cannot penetrate most buildings, effective positioning cannot be achieved indoors

Method used

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  • Indoor positioning method based on visible light label
  • Indoor positioning method based on visible light label
  • Indoor positioning method based on visible light label

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Embodiment Construction

[0027] The implementation of the present invention will be further described in detail below according to the drawings and examples.

[0028] Such as figure 1 As shown, the size of the indoor model of the present invention is 100m × 100m × 3m, the LED lights are installed on the ceiling, and the LED lights are expanded to four sides in the form of an equilateral triangle, and the irradiation of the LED lights distributed in an equilateral triangle divides the indoor space into There are several triangular prism spaces, and each triangular prism space is called a space unit, and 3 LED lights are installed on the ceiling of each unit. The reference plane, that is, the horizontal plane where the photodetector for receiving the visible light signal is located, is 1m away from the ground.

[0029] Such as figure 2 As shown, take the lower left corner as the origin to make a Cartesian coordinate system. In order to distinguish the LEDs on the ceiling for positioning, each LED is ...

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Abstract

The invention relates to an indoor positioning method based on a visible light label, and belongs to the technical field of wireless communication. The method disclosed by the invention comprises the following steps: on the basis of visible light communication, emitting a visible light signal with an alignment code type by a transmitting terminal by controlling a light-emitting diode (LED) array, so that an indoor user analyzes the position from a received light signal, and each LED has a sole identity (ID) number; designing a locating data frame structure which is transmitted by the LED in a cycle; loading to an LED drive amplifying circuit; driving the LED lamp array to transmit a data light signal; and locating the user in a sub-cell with the maximal optical power when a detector identifies a frame header. The method is free of frequency band application, free of electromagnetic interference, green and safe, and higher in accuracy located on the basis of the visible light LED. In addition, green lighting also can be carried out in an indoor scene in visible light LED communication, the indoor visible light communication is located through the existing floodlight, a visible light source does not need to be arranged additionally, and achievement of indoor location is facilitated.

Description

technical field [0001] The invention relates to an indoor positioning method based on a visible light tag, belonging to the technical field of wireless communication. Background technique [0002] With the development of technologies such as mobile communications and wireless networks, location-based services have attracted more and more attention. The acquisition of location information can provide more convenience for location-based services. For example, in areas such as emergency assistance, personal healthcare, cognitive radio, and personalized information transmission, when people are located in different geographic locations, information corresponding to their current location can be conveniently obtained. [0003] Outdoors, location information is generally obtained through GPS global positioning satellites. The GPS device estimates the current position of the receiving terminal by receiving signals from four or more satellites, which can achieve high-precision pos...

Claims

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Application Information

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IPC IPC(8): G01S5/16H04B10/116
CPCG01S5/16H04B10/1149
Inventor 杨爱英吴永胜王雨孙雨南
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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